Pet fountain



FIG. 1 is a front perspective view of a pet fountain in accordance with our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The depict illustration only, and form no part of the claimed design.

The broken lines depict unclaimed features of the pet fountain that are shown for illustrative purposes and form no part of the design claim. 

CLAIM The ornamental design for a pet fountain, as shown and described. 